c get array pointer

__constant__ float dev_filter1[4];
__constant__ float dev_filter2[16];
__constant__ float dev_filter3[64];

int main()
{...}

__global__ void globalToRegisterKernel(..., filterWidth, ...)
{
    float *filter;
    switch (filterWidth)
    {
        case(2):
        {
            filter = dev_filter1;
            break;
        }
        case(4):
        {
            filter = dev_filter2;
            break;
        }
        case(8):
        {
            filter = dev_filter3;
            break;
        }
    }

    ...
}